Which one is the Driver Tube?

[Giants of the West]

Hi guys I have a Triple Rec and feel i may have a driver tube problem. Just a quick question, Is it located in v1 or v5 and if so is it a special tube or is it just a normal 12ax7.

Cheers Dudes.

 

[crane]

Everything is in the manual.
V5.
Cheers.

 

[dmt]

the one behind the steering wheel